I-P37, I-M26, I-M423, I-L233, I-L160, I-L621, I-CTS10228, I-L161 and all subgroups of I-P37 are welcome to join the I2a Y-Haplogroup Project. We accept people with Y12 or more STR markers who have a predicted I-P37 haplogroup, or a confirmed P37+ test result, or people with a Big Y or SNP result for one of the subgroups of I-P37 (M26+, M423+, L233+, L160+, L161+, L621+ CTS10228+ etc) or a predicted I-M423, I-L161 etc. haplogroup. We also accept kits that show a Y-DNA haplogroup of I-P37 or one of its subgroups from an autosomal test (Family Finder, MyHeritage, AncestryDNA, 23andMe). But we strongly recommend that you order a Y37 or Big Y-700 test, unless a close male relative has already done a test. If you already know that you are not part of I-P37 you don't need to join this project (for example people who are I-M223, I-L38 or I-L39 should join the I-M223 or I-L38/I-L39 haplogroup projects instead, we have nothing to help you here). If you are unsure whether you are I-P37 or not you can join this project and we will take a look at your results and direct you to another project if needed, or email berniecullen@gmail.com